#!/usr/bin/env node

const EventEmitter=require('events').EventEmitter,
      log=console.log,
      e=new EventEmitter;
setInterval(()=>{
  e.emit('hello');
},1000);
setTimeout(()=>{
  e.emit('bye')
},5000);
e.on('hello',()=>{
  log('hello world!');
});
e.on('bye',()=>{
  log('bye');
});
